what is coal? - correct answer ✔Plant material, buried by sediment,
compressed into coal, found in warm and coastal swamps.
Cretaceous Period - correct answer ✔145-65 mya (last dinosaurs)
Jurrasic Period - correct answer ✔200- 145 mya
Triassic Period - correct answer ✔252-200 mya (228 ma - first dinosaurs)
Three main rock types - correct answer ✔1. Sedimentary rock
2. Igneous Rock
3. Metamorphic rock
, Two types of sedimentary rocks - correct answer ✔1. clastic (Sandstone,
Siltstone, Shale)
2. chemical (Limestone, Salts)
igenous rock - correct answer ✔rock formed from hardened molten materials
sedimentary rock - correct answer ✔A type of rock that forms when particles
from other rocks or the remains of plants and animals are pressed and
cemented together
metamorphic rock - correct answer ✔rock that has been changed by heat
and pressure
sedimentary structures - correct answer ✔1. Asymmetrical ripples (forms in
rivers and deserts)
2. Symmetrical ripples (From wave actions)
3. imbricated glass (Stacked in same direction)
4. mud cracks (water dries up & clay minerals contract)
Lithostratigraphy - correct answer ✔Putting rocks in order from oldest to
youngest using superposition and original horizontality
cross-cutting relationships - correct answer ✔Principle stating that a fault or
intrusion is younger than the rock it cuts across.
Inclusions - correct answer ✔Rock surrounded by other rock, inclusions are
always older than its host
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